Abo Bibliothek: Guest
Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

A comparison between DNS derived and measured streamwise oscillating-cylinder wake

pages 1223-1226
DOI: 10.1615/TSFP3.2040
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ABSTRAKT

The wake of a streamwise oscillating cylinder is presently investigated. The Reynolds number, based the cylinder diameter d, investigated is 300. The cylinder oscillates at an amplitude of 0.5d and a frequency fe/fs, where fe is the cylinder oscillating frequency and fs is the natural vortex shedding frequency of a stationary cylinder. Under these conditions the flow is essentially two dimensional. A two-dimensional direct numerical simulation (DNS) scheme has been developed to calculate the flow. The DNS results display a street of vortices symmetrical about the centreline, each containing two counter-rotating structures, which is in excellent agreement with measurements. The drag and lift on the cylinder have also been examined.

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